I am having a strange problem when skipping forward while watching recorded tv from one particular OTA channel. When I skip forward it sometimes takes several seconds before the audio will sync with the video. Typically the video will start but there is no audio until it syncs. If I skip back slightly after skipping forward then it will sync much quicker. This only happens on recorded tv from my local CBS OTA channel. Live tv on this channel works fine and recorded tv from other OTA channels works fine. I am using MPAR and LAV for ts recording playback. Any suggestions?